Hi Mike and Fred,
UMBEL (Upper Mapping and Binding Exchange Layer) [1] is a lightweight
ontology for relating Web content and data to a standard set of 20,000
subject concepts. Based on OpenCyc [2], these subject concepts have
defined relationships between them, and can act as semantic binding nodes
for any data or Web content.
Very nice work and great to see that UMBEL is available as Linked Data and
already interlinked with various ontologies and datasets.
A further 1.5 million named entities have been extracted from Wikipedia
and mapped to the UMBEL reference structure with cross-links to YAGO [3]
and DBpedia [4].
In order to allow people to browse from DBpedia into UMBEL and in order to
give Semantic Web crawlers more starting points to crawl UMBEL and its
interlinked datasets, it would be great to set RDF links from DBpedia into
UMBEL.
Would it be possible that you send us the 1.5 million RDF links from UMBEL
to DBpedia that you already got so that we can serve them together with
DBpedia via our Linked Data interface and SPARQL endpoint?
Reading the UMBEL documentation, I noticed that you use the umbel:isLike
property to link to DBpedia and the owl:sameAs property to link to YAGO. For
instance:
ne:Pfizer umbel:isLike dbpedia:Pfizer
ne:Pfizer owl:sameAs yago:Pfizer
The UMBEL spec defines umbel:isLike as
"Additionally, the property umbel:isLike can be used to state that two named
entities "likely" have the same identity."
Why do you think that your RDF links to YAGO are more likely to be correct
than your links into DBpedia?
As all three datasets are derived from Wikipedia and Wikipedia page
identifiers should be present in all three datasets, I think we could use
owl:sameAs between all three.
Keep on the great work and let's hope that UMBEL develops into an important
interlinking hub for the Web of Data.
Cheers
Chris
The system can easily be extended with additional dictionaries of named
entities, including ones specific to enterprises or domains.
UMBEL is provided as open source under the Creative Commons 3.0
Attribution-Share Alike license. The complete ontology with all subject
concepts, definitions, terms and relationships can be freely downloaded
[see 5]. All subject concepts and named entities are available as Linked
Data [see 5]. Five volumes of documentation [5] are also available.
The release is accompanied by about a dozen Web services [6] for using or
manipulating UMBEL, along with a new introductory slide show [7].
Additional release information may be found on Fred's [8] or my [9]
separate blog postings.
We welcome those with interest or suggestions for improvements to do so
through the UMBEL discussion forum [10]. We will shortly be putting
easier services online for such input.
So, enjoy! We look forward to your commentary, suggestions and putting
UMBEL under production-grade stress. We know will be doing the same!
Regards, Mike
[1] http://www.umbel.org/
[2] http://www.opencyc.org
[3] http://www.mpi-inf.mpg.de/~suchanek/downloads/yago/
[4] http://dbpedia.org
[5] http://www.umbel.org/documentation.html
[6] http://umbel.zitgist.com/
[7] http://www.slideshare.net/mkbergman/
[8]
http://fgiasson.com/blog/index.php/2008/07/16/starting-to-play-with-the-umbel-ontology/
[9] http://www.mkbergman.com/?p=449
[10] http://groups.google.com/group/umbel-ontology/
